Computer Networking
If a switch receives a frame and the source MAC address is not in the MAC address table but the destination address is, what will the switch do with the frame?

Flood the network with the frame
Add the destination to the MAC address table and then forward the frame
Discard it and send an error message back to the originating host
Add the source address and port to the MAC address table and forward the frame out the destination port

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Computer Networking
The packets switching concept was first proposed

None of these
All of these
in the late 1980s for the Defense Ministry of US.
in the early 1960s for military communication systems, mainly to handle speech
in the late 1950s for Defense Ministry of US

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